(function(window) {
	function startHLayout() {
		var md
		var grabEl
		var sectionResizeEl

		// Global mouse update
		document.addEventListener("mousemove", function(e) {
			if (md === undefined) md = {x: e.clientX, y: e.clientY}
			md.deltaX = e.clientX - md.x
			md.deltaY = e.clientY - md.y
			md.x = e.clientX
			md.y = e.clientY
		})
		// Handle dragstart
		document.addEventListener("mousedown", function(e) {
			// Check for section resize
			if (e.target.matches("section")) {
				e.preventDefault()
				e.stopPropagation()

				sectionResizeEl = e.target
				sectionResizeEl.classList.add("resizing")
				return
			}
			// Check if element is our
			if (!e.target.matches(".hpane > header")) {
				return
			}
			e.preventDefault()
			e.stopPropagation()
			grabEl = e.target.parentElement

			var parent = grabEl.parentElement

			var elDim = grabEl.getBoundingClientRect()
			document.body.appendChild(grabEl)
			grabEl.classList.add("detached", "moving")
			grabEl.style.width = elDim.width + "px"
			grabEl.style.height = elDim.height + "px"

			// Add discover to other panes
			// $('.hpane:not(.detached)').addClass("discover");
			// All childs to pointer event none
			if (parent.matches("section")) {
				var child = parent.querySelector(".hpane, section") // hpane or section
				child.removeAttribute("style")
				child.style["flex-basis"] = parent.style["flex-basis"]
				parent.parentElement.insertBefore(child, parent)
				parent.parentElement.removeChild(parent)
			}
		})

		// Handle drag
		document.addEventListener("mousemove", function(e) {
			if (sectionResizeEl != null) {
				var firstEl = sectionResizeEl.children[0]
				var secondEl = sectionResizeEl.children[1]
				// Default vertical
				var	tDim = "offsetWidth"
				var	tDelta = "deltaX"
				if (sectionResizeEl.matches(".horizontal")) {
					tDim = "offsetHeight"
					tDelta = "deltaY"
				}
				var parentValue = sectionResizeEl[tDim]

				var firstNewDim = (firstEl[tDim] + md[tDelta]) / parentValue * 100
				var secondNewDim = (secondEl[tDim] - md[tDelta]) / parentValue * 100

				firstEl.style["flex-basis"] = firstNewDim + "%"
				secondEl.style["flex-basis"] = secondNewDim + "%"
				return
			}

			// console.log("Drag:",e)
			// if (!e.target.matches(".hpane > header")) { // we only deal with header
			// 	return
			// }
			if (grabEl === undefined) return
			// Get Absolute position somehow
			// var pos = $grab.position();
			var elDim = grabEl.getBoundingClientRect()
			// var nx = elDim.left + md.deltaX
			// var ny = elDim.top + md.deltaY
			var offX = elDim.width / 2
			var offY = 0
			grabEl.style.left = e.clientX - offX + "px"
			grabEl.style.top = e.clientY - offY + "px"
			var targetEl = e.target
			// if(!targetEl.matches(".hpane")) {
			for (;targetEl !== null && !targetEl.matches(".hpane"); targetEl = targetEl.parentElement); // find Parent ".hpane"

			if (targetEl != null && targetEl.matches(".hpane:not(.preview)")) {
				// check attachment
				var placement = checkAttach(targetEl, e)
				if (placement !== 0) {
					previewPanel(grabEl, targetEl, placement)
				} else {
					removePreviews()
				}
			} else {
				removePreviews()
			}
		})
		document.addEventListener("mouseup", function(e) {
			if (sectionResizeEl) {
				sectionResizeEl.classList.remove("resizing")
				sectionResizeEl = null
				return
			}
			// Drag
			if (grabEl === undefined) return
			removePreviews()
			grabEl.classList.remove("moving")

			var targetEl = e.target
			for (;targetEl !== null && !targetEl.matches(".hpane"); targetEl = targetEl.parentElement); // find Parent ".hpane"

			if (targetEl !== null) {
				var placement = checkAttach(targetEl, e)
				if (placement !== 0) {
					grabEl.classList.remove("detached")
					grabEl.removeAttribute("style")
					attachPanel(grabEl, targetEl, placement)
				}
			}
			grabEl = undefined
		})
	}

	function attachPanel(grabEl, targetEl, placement) {
		if (!placement) {
			return
		}
		var type
		if ((placement % 2) === 1)type = "horizontal" // else
		if ((placement % 2) === 0)type = "vertical"

		var parentEl = targetEl.parentElement
		var sectionEl
		var sibEl = targetEl // it will be new sibling

		var newSectionEl = document.createElement("section")
		newSectionEl.classList.add(type)
		newSectionEl.style["flex-basis"] = targetEl.style["flex-basis"]
		if (sibEl.nextElementSibling !== null && sibEl.nextElementSibling.matches("section, .hpane")) {
			parentEl.insertBefore(newSectionEl, parentEl.children[0])
		} else {
			parentEl.appendChild(newSectionEl)
		}
		// parentEl.removeChild(sibEl)

		grabEl.style["flex-basis"] = "33%"
		sibEl.style["flex-basis"] = "66%"
		if (placement < 3) {
			newSectionEl.appendChild(grabEl)
			newSectionEl.appendChild(sibEl) // will this work?
			// $section.append(what);
			// $section.append("<div class='splitter'></div>");
			// $section.append($sib);
		} else {
			newSectionEl.appendChild(sibEl)
			newSectionEl.appendChild(grabEl) // will this work?
			// $section.append($sib);
			// $section.append("<div class='splitter'></div>");
			// $section.append(what);
		}
	}

	function removePreviews() {
		var previewEls = document.querySelectorAll(".attach-preview")
		if (previewEls === null) { // not sure if it is needed
			return
		}
		for (var i = previewEls.length; i--; i >= 0) {
			previewEls[i].style.display = "none"
		}
	}
	function checkAttach(targetEl, e) {
		var targetDim = targetEl.getBoundingClientRect()

		var tW = targetDim.width / 3
		var tH = targetDim.height / 3
		var rPos = {x: e.pageX - targetDim.left, y: e.pageY - targetDim.top}
		// Calc dists and check the closest one
		// Counter clock wise 1 TOP 2 RIGHT 3 BOTTOM 4 LEFT
		if (rPos.x > tW && rPos.x < targetDim.width - tW && rPos.y < tH) {  													// 1 Top
			return 1
		} else if (rPos.x > tW && rPos.x < targetDim.width - tW && rPos.y > targetDim.height - tH) { 	// 3 Bottom
			return 3
		} else if (rPos.x < tW) {																																			// 2 Left
			return 2
		} else if (rPos.x > targetDim.width - tW) {			   																						// 4 Right
			return 4
		}
		return 0
	}

	function previewPanel(grabEl, targetEl, placement) {
		var previewEl = document.querySelector(".attach-preview")
		if (previewEl === undefined || previewEl === null) {
			previewEl = document.createElement("div")
			previewEl.setAttribute("class", "attach-preview")
			previewEl.setAttribute("style", "display:none;position:fixed")
			document.body.appendChild(previewEl)
		}
		previewEl.style.display = "block" // Show element
		var targetDim = targetEl.getBoundingClientRect()
		if ((placement % 2) === 1) { // Odd is top or bottom
			previewEl.style.height = (targetDim.height / 3) + "px"
			previewEl.style.width = targetDim.width + "px"
			previewEl.style.left = targetDim.left + "px"
			if (placement === 1) {
				previewEl.style.top = targetDim.top + "px"
			} else {
				previewEl.style.top = (targetDim.top + targetDim.height - (targetDim.height / 3)) + "px"
			}
		} else if ((placement % 2) === 0) {
			previewEl.style.height = targetDim.height + "px"
			previewEl.style.width = (targetDim.width / 3) + "px"
			previewEl.style.top = targetDim.top + "px"
			if (placement === 2) {
				previewEl.style.left = targetDim.left + "px"
			} else {
				previewEl.style.left = (targetDim.left + targetDim.width - (targetDim.width / 3)) + "px"
			}
		}
	}
	window.onload = startHLayout
})(window)

/*
var md
function startHLayoutEvents() {
	document.addEventListener("mousemove", function(e) {
		if (md === undefined) md = {x: e.clientX, y: e.clientY}
		md.deltaX = e.clientX - md.x
		md.deltaY = e.clientY - md.y
		md.x = e.clientX
		md.y = e.clientY
	})
	// Global mouse event;
	
	var $grab = undefined;
	// Start drag
	$(document).on('mousedown','.hpane > header',function(e){
		if(e.which != 1) return;
		if(!$(e.target).is(".hpane > header")) return;
		
		e.preventDefault();
		e.stopPropagation();
		
		$grab = $(this).parent();
		$parent = $grab.parent();
		var next = $grab.next();
		var origW = $grab.width();
		var origH = $grab.height();
		
		// Check if we are root?
		
		var dim = {w: $grab.width(), h: $grab.height()};
		var pos = $grab.position();
	
		$($grab).detach().appendTo('body').addClass("detached").addClass("moving").css({width:dim.w,height:dim.h});
		
		$('.hpane:not(.detached)').addClass("discover");
		
		// All childs to pointer event none
		if($parent.is('section')) {
			// We aren't

			$child = $parent.children('.hpane, section');
			$child.attr('style','');
			$child.css('flex-basis',$parent.css('flex-basis'));
			$child.detach();
			$parent.replaceWith($child);
		}
	})
	
	var $sectionResize = null;
	$(document).on('mousedown','section',function(e) {
		
		var $target = $(e.target);
		if(!$target.is("section"))return;
		e.preventDefault();
		$sectionResize = $target;
		$sectionResize.addClass("resizing");
	});
	$(document).on('mousemove',function(e) {
		if($sectionResize == null) return;
		var $first = $sectionResize.children(':nth-child(1)');
		var $second = $sectionResize.children(':nth-child(2)');
		
		
		var common;
		var common2;
		if( $sectionResize.is(".horizontal")) {common = "height",common2 = "deltaY"};
		if( $sectionResize.is(".vertical")) {common = "width", common2 = "deltaX"};

		var parentValue = $sectionResize[common]();
		var hFirst = $first[common]();
		var hSec = $second[common]();
	
		var newVal1 = (hFirst + md[common2]) / parentValue * 100;
		var newVal2 = (hSec -md[common2]) / parentValue * 100;
			
		$first.css('flex-basis',newVal1 + "%");
		$second.css('flex-basis',newVal2 + "%");
			
	});
	$(document).on('mouseup',function(e) {
		if($sectionResize) {
			$sectionResize.removeClass("resizing");
		}

		$sectionResize = null;
	});
	
	
	$(document).on('mousemove',function(e) {
		if($grab == undefined) return;
		var pos = $grab.position();
		
		var nx = pos.left + md.deltaX;
		var ny = pos.top + md.deltaY;
		var offX = $grab.width() / 2;
		var offY = 0;
		
		$grab.css({left: e.clientX - offX, top: e.clientY -offY});
		
		// Check target
		var $target = $(e.target);
		
		if(!$target.is(".hpane")) {
			$target = $target.parents(".hpane");
		}
		
		
		if($target.is(".hpane:not(.preview)")){
			var placement = checkAttach($target,e);
			if(placement != 0 ) {
				previewPanel($grab,$target,placement);
			} else {
				removePreviews();
			}
		
		} else {
			removePreviews();
			
		}
		
	});
	
	$(document).on('mouseup',function(e) {
		if($grab == undefined) return;
		
		removePreviews();

		$grab.removeClass("moving");
		$('.hpane').removeClass("discover");

		$target = $(e.target);
		if(!$target.is(".hpane")) $target = $target.parents('.hpane');
		
		if($target.is(".hpane")){
			var placement = checkAttach($target,e);
			if(placement != 0 ) {
				$grab.removeClass("detached");
				$grab.attr('style','');
				attachPanel($grab,$target,placement);
			}
		}
		
		$grab = undefined;
		return;
	});
	
}


	
	function recalcFlex() {
		$('section.horizontal > section, section.horizontal > .hpane').each(function() {
			var parentH = $(this).parent().height();
			var curH = $(this).height();
			var flex = 100 * curH / parentH;
			$(this).css({'flex-basis':flex + "%"});
		});
		$('section.vertical > section, section.vertical > .hpane').each(function() {
			var parentW = $(this).parent().width();
			var curW = $(this).width();
			var flex = 100 * curW / parentW;
			$(this).css({'flex-basis':flex + "%"});
		});
	}	
	recalcFlex();
	
	function checkAttach($target,e) {
		
		var tW = $target.width()/3;
		var tH = $target.height()/3;
		
		var targetPos = $target.offset();
		var dim = { w: $target.width(), h: $target.height()};
		var rPos = { x: e.pageX - targetPos.left,  y: e.pageY - targetPos.top};
		//Calc dists and check the closest one
		
		
		if(rPos.x > tW && rPos.x < dim.w - tW && rPos.y < tH) {  					// 1 Top
			return 1;
		} else if(rPos.x > tW && rPos.x < dim.w - tW && rPos.y > dim.h - tH){ 		// 3 Bottom
			return 3;
		} else if(rPos.x < tW) {													// 2 Left
			return 2;
		} else if( rPos.x > dim.w - tW){											// 4 Right
			return 4;
		}
		
		return 0;
	}
	function removePreviews() {
		$('.attach-preview').hide();
	}
	function previewPanel($grab,$target,attach) {
		
		$previewDiv = $(".attach-preview");
		if($previewDiv.length == 0 ) {
			$previewDiv = $('<div class="attach-preview" style="display:none;position:fixed"></div>').appendTo('body');
		}
		
		$previewDiv.show();
		var dim = {w:$target.width(),h:$target.height()};
		var pos = $target.offset();
		
		if((attach % 2) == 1) {
			$previewDiv.css('height',dim.h/3);
			$previewDiv.css("width",dim.w);
			$previewDiv.css("left",pos.left);
			if(attach == 1) {
				$previewDiv.css('top',pos.top);
			} else {
				$previewDiv.css('top',pos.top  + dim.h - dim.h/3);
			}
		} else if((attach % 2) == 0) {
			$previewDiv.css("height",dim.h);
			$previewDiv.css('width',dim.w/3);
			$previewDiv.css("top",pos.top);
			if(attach == 2) {
				$previewDiv.css('left',pos.left);
			} else {
				$previewDiv.css('left',pos.left + dim.w - dim.w/3);
			}

		}
			
	}
	function attachPanel(what,target, attach) {
		if(attach){
			var type
			if((attach % 2) == 1)type = "horizontal";
			if((attach % 2) == 0)type = "vertical";
			$target = $(target);
			$parent = $(target).parent();
			
			$sib = $(target);
			if($sib.next().is("section, .hpane,.splitter")) {
				$section = $("<section class='" + type +"' style='flex-basis:" + $target.css('flex-basis') + "'></section>").prependTo($parent);
			} else {
				$section = $("<section class='" + type + "' style='flex-basis:" + $target.css('flex-basis') +" '></section>").appendTo($parent);
			}
			$sib.detach();
			what.css('flex-basis','33%');
			$sib.css('flex-basis','66%');
			if(attach < 3) {
				$section.append(what);
				//$section.append("<div class='splitter'></div>");
				$section.append($sib);
			} else {
				$section.append($sib);
				//$section.append("<div class='splitter'></div>");
				$section.append(what);
			}
			
		}
	
	}
	

$(function() {
	
	startHLayoutEvents();
	
});*/